Find the possible values of the included angle of a triangle with:

MATHEMATICS · Multi-part · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

Find the possible values of the included angle of a triangle with: (1) sides of length

5 \text{ cm}

and

8 \text{ cm}

, and area

15 \text{ cm}^2

(2) sides of length

45 \text{ km}

and

53 \text{ km}

, and area

800 \text{ km}^2